Python Solution (Recursive)


  • 0
    A
    # Definition for a binary tree node.
    # class TreeNode(object):
    #     def __init__(self, x):
    #         self.val = x
    #         self.left = None
    #         self.right = None
    
    class Solution(object):
        def lowestCommonAncestor(self, root, p, q):
            """
            :type root: TreeNode
            :type p: TreeNode
            :type q: TreeNode
            :rtype: TreeNode
            """
            if not root:
                return
            elif (root.val >= p.val and root.val <= q.val) or (root.val <= p.val and root.val >= q.val):
                return root
            elif root.val > p.val and root.val > q.val:
                return self.lowestCommonAncestor(root.left,p,q)
            else:
                 return self.lowestCommonAncestor(root.right,p,q)
    

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